Agricultural implement



Feb. 8, 1927.

. A. S. KROTZ AGRICULTURAL IMPLEMENT Filed Jan. 30. 1920 2 Sheets-Sheetl I Fig.1

fair- Feb. 89

A S. KROTZ' AGRICULTURAL IMPLEMENT 2 Sheets-Sheet 2 Filed Jan. 50. 1920@wvewroz I Patented Feb. 8, 1927.

u ITE an ALVARO s. KIROTZ, or JANESVILLE, wxsoonsrnnssrenoa no GENERALivroronsoon IORATION, or nnrnom, MICHIGAN, A eoaronnaron ornnnnwannaAGRICULTURAL ,riarrnrinnn Application filed January 30, 1920. Serial No.355,078.

My invention relates to an attachment for agricultural implements andmore particuimprove the construction of devices of this.

class and to provide a harrow attachment which shall be simple in formand inexpensive in manufacture, and at the same time highly efficient inoperation.

In the accompanying illustrated one embodiment of my invention:

Fig. 1 is a side elevation of a plow e nipped with a harrow attachment.I Fig. 2 is a side elevation of the :harrow proper. I

Fig. 3 is a view similar to Fig. 2, but showing the position of theteeth when the plow is being backed.

Fig. 4 is a plan view of the harrow attached to a plow frame. s

Fig. 5 is a rear elevation of the harrow showing the arrangement of theteeth,

Fig. 6 is a detail view showing the spring bar which'carries the harrow,and

Figs. 7 and 8 are detail views of the means for connect ng the harrow tothe spring bar.

In the drawings, 10 designates the frame of a plow which may be,'asillustrated, aj

riding gang plow. A further description of the plow 1s deemedunnecessary, s nce my invention is in no way concerned with the spe-,ci-fic character of the plow further than the necessity ofproviding'some suitable means for mounting the harrow attachment uponthe implement frame. I v

trated I have provided brackets 11, 12, consisting offlat bars bent asmay be necessary, and bolted or otherwise secured to appropriate partsof the frame. These brackets afford asupport upon which may be mount-eed, as by supplemental brackets 1'3, 14, a notched segment 15, carryinga stu grally or otherwise ri'gidly connected to a lever 18 adapted to beset at any desired position by co-operation of an ordinary detentdrawings in which is fteeth 'shall always remain parallel my other"wh'le permitting variations in" .ards 26,1 ng

In the form .illus-e d 16. Upon this stud is 1ournaled a block 17'inte-f with the notched segment 15. is provided with aslotf1j9throughWhich.62;-

The bat 17 tends nee 'd of a flat spring-"tan o, th

end ofthe being secured to the {block by bolt 21;

The harrow proper comprises a plurality of frame members angle] bars towhich aresecured, as by'rivets; the harrow' teeth 23. These teeth con-'sis't' of pieces offiat bar, tapered somewhat at the lower-"end,

head to seat upon the angle-barff fM I e members 22. The harrowcomprises" three of the (frame n 1embe'rs, {an d the teeth attached 22,formed preferablyof I as shown; and "bentjat right angles at the upperen'd 'to provide 'a'iiat thereto in staggered relationship so as to be Yapproximately equally 'spa'ced' transversely toithe directionOrtrave1,'as, hoiwnirr Fig. 5.

To the upper sides of the: ffaine members are rigidly secured standards24 to which upper and lower links 25, 25" are pivotally attached,thereby providinga paralle .l-iii 1 age connection between the frameinenibers.

Bythis connection I nsure that the h H surfafe. members 22, preferinclination re ativeto the groun' On one ofthe" frame ably the .forwardone',. l' mount we stander than rhestaadaras 122d, one a means ofsupport for one." air of links 25, 25'. Atthe upper end's of stqaaardsee is p votally supported alsl'otted' trunnion bar 27, through the slot'of which the jjspring frame members, preferably" the mid le'one,

I mount a pair of standards 28 which nu y be individually identical withstandards 24,

and to one of which the pair of links 25, 25',

secured to standard26, may also rbejfsedured. Atthe upper ends ofstandardsZSiS mounted pin or bolt 29 around which the rear .endof"spring bar fZQis bent to form a pivotal support for the said bar. 7 Upon'90 15211120 extends loosely. Gil anjother of the position'on the bar"20 by mines the inclination of the teeth the normal operation of theharrow, Inasmuch gasthe drag onthe teeth'will tend to distort the framein such mann'eras to cause trunnion" to slide forwardly on spring s 1.of these standards261serving,however, as"

"bar 20 until said trunnion bar engages with be attached, is. caused tomove in a rearward direction as frequently happens in opera ,tion, theteeth are free to assume a rearward inclination as shown in Fig. 3, andthereby tend to slide over the surface, offering no material resistanceto the backward movement.

The'pressure exerted to force the teeth into the ground is readilydetermined by the adjustment of the lever 18, thus raising or depressingthe bar 20. This pressure will be exerted in a yielding manner since thebar is in the nature of a. spring. Theuse of this spring bar not onlyserves to exert a yielding downward pressure on the teeth but alsopermits a certain extent of lateral movement under resilient restraintand also allows the harrow to tilt and otherwise conform in its positionto irregularities in th surface over which it may operate.

Attention may be called to the fact that the harrow I "have devised isconstructed almost entirely of parts, which may be readily shapedfromicommercial forms of bar iron thereby enabling the device to bemanufactured at low cost while still affording a high degree'of strengthand durability.

' 1 While I have'herein described a harrow 1 attached to a plow frame itwill be understood by'those skilled in the art that in some phases ofthe invention it is'notnecessarily limited to an implement of the harrowtype, nor to the use ofthe attachment in connection with a plow. Thespring supporting means above described may, of

course, be utilized for the support of other earth-working implements,as a clod crusher or cultivator, It is also clear that, instead ofattaching the implement to a plow 1 frame, it may be attached,either'singly or in gangs, to some other form of agricultural implement,or to a frame, wheeled or not,

as vdesired, designed merely to carry the at ta'chment, and'used forcultivating or har- 1 rowing purposes only.

It willalso be understood that various modifications and variations indetails I of constructionmaybe made without departing from the spiritand scope of the invention, and therefore I do not wish to be limited tothe specific structure above de-' scribed. I

I claim:

l. The combination of an implement frame, and a harrow, means forsupporting said-harrow from said frame adapted todraw said harrowforwardly when the frame moves in a forward direction and to force saidharrow rearwardly whenj'the frame moves in a rearward direction, saidharrow comprising a series of teeth and means for moves in a forwarddirect-ion and to force said harrow rearwardly when the frame moves in arearward direction, said harrow comprising frame members pivotallyconnected, teeth mounted upon said frame members and means for adjustingthe angular relation of said teeth to the ground surface,

said means adapted to permit said teeth to be inclined rearwardly as aresult of backward movement of said harrow.

. 3. A harrow comprising frame members, teeth secured to said framemembers, means pivotally connecting said frame members and providing forsimultaneousadjustment of the inclination orsaid teeth, and a bar fordrawing said harrow, said bar pivotally attached to said frame membersat one point and having slidable connection.therewith at another point.i

4. A harrow comprising frame members, teeth secured to said framemembers, means pivotally connected'to said frame members and permittingmovement of said members to adjust the inclination of the teeth, a barfor drawing said harrow, said bar pivotally connected to said frame atone point and having slidable connection therewith at another point, andadjustable means on said bar for limiting the sliding movement, andthereby determining the inclination of said teeth,

5. The combination with a plow comprising a frame, of a spring bar,means for supporting said bar for pivotal movement on said frame, aharrow attached to said bar provided with teeth adapted to assumedifferent inclinations and means on said bar to determine theinclination of said teeth, .said' means adapted to permit said teeth tobe inclined rearwardly as a result of backward movement of said harrow.

6. The combination of a frame, a bar connected thereto, and a harrow,said harrow comprising a plurality of frame members,

teeth secured thereon, standards mounted upon said frame members, linkspivotally connecting said standards for parallel motion, said barpivotally connected to Said frame members at one point and having freesliding connection therewith at another point, and a stop on said bar tolimit moverearwardly by said bar in accordance with the direction ofmovement of the plow, means pivotally connecting said frame membersadapted to maintain said teeth in parallel relation, and means limitingthe pivotal movement of said members to determine vthe workinginclination of said teeth, said means permitting free movement to givesaid teeth a rearward inclination when the plow is moved rearwardly.

S. The combination with an implement frame of a bar connected to saidframe, a

liar-row frame connected to, said bar, said harrow frame comprisingangle bars, and harrow teeth depending therefrom, said teeth beingformed of flat bars with fiat heads bent at right angles to the toothportion, said heads seated in the angle of the angle bars and engagingboth flanges thereof and secured in such position.

In testimony whereof I aflix my signature.

ALVARO S. KROTZ.

